Use KWin's internal stacking order for managed windows, not the X one.

Fixes composited drawing of windows on other desktops.
BUG: 161436


svn path=/trunk/KDE/kdebase/workspace/; revision=828060

composite.cpp

@@ -316,7 +316,7 @@ void Workspace::performCompositing()
         return;
         }
     // create a list of all windows in the stacking order
-    ToplevelList windows = rootStackingOrder();
+    ToplevelList windows = compositingStackingOrder();
     foreach( EffectWindow* c, static_cast< EffectsHandlerImpl* >( effects )->elevatedWindows())
         {
         Toplevel* t = static_cast< EffectWindowImpl* >( c )->window();

layers.cpp

@@ -722,20 +722,21 @@ bool Workspace::keepTransientAbove( const Client* mainwindow, const Client* tran
 
 // Returns all windows in their stacking order on the root window, used only by compositing.
 // TODO This possibly should be optimized to avoid the X roundtrip and building it every pass.
-ToplevelList Workspace::rootStackingOrder() const
+ToplevelList Workspace::compositingStackingOrder() const
     {
     Window dummy;
     Window* windows = NULL;
     unsigned int count = 0;
     XQueryTree( display(), rootWindow(), &dummy, &dummy, &windows, &count );
     ToplevelList ret;
+    // use our own stacking order, not the X one, as they may differ
+    foreach( Client* c, stacking_order )
+        ret.append( c );
     for( unsigned int i = 0;
          i < count;
          ++i )
         {
-        if( Client* c = findClient( FrameIdMatchPredicate( windows[ i ] )))
-            ret.append( c );
-        else if( Unmanaged* c = findUnmanaged( WindowMatchPredicate( windows[ i ] )))
+        if( Unmanaged* c = findUnmanaged( WindowMatchPredicate( windows[ i ] )))
             ret.append( c );
         }
     foreach( Deleted* c, deleted )

workspace.h

@@ -514,7 +514,7 @@ class Workspace : public QObject, public KDecorationDefines
         void removeTabBoxGrab();
 
         void updateStackingOrder( bool propagate_new_clients = false );
-        ToplevelList rootStackingOrder() const;
+        ToplevelList compositingStackingOrder() const;
         void propagateClients( bool propagate_new_clients ); // called only from updateStackingOrder
         ClientList constrainedStackingOrder();
         void raiseClientWithinApplication( Client* c );